Sentence examples for upstream back from inspiring English sources
Activation results in the formation of a pseudopod, which allows mature spermatozoa that fail to fertilize the oocyte to "swim upstream" back to the spermatheca after each round of ovulation.
Two beams of light race against each other, like two swimmers, one struggling upstream and back, while the other, covering the same distance, just crosses the river and returns.
They must then migrate back upstream, often five miles or more.
They spend several years there, feeding and growing quite large, before swimming back upstream to spawn and die.
Hiking back upstream, weary but elated, I was happy to see Wattum and the Beaver waiting.
Mr. Gephard said dam removal is unequivocally the best way to get fish like salmon, shad, alewife, which need to swim upstream to spawn, back where they belong.
Fish ladders help on the way back upstream, but those salmon that get through in both directions end up traumatized and weakened, biologists say.
We consulted the map: We were to hike a mile downstream, cross at a footbridge, and then walk a mile back upstream.
Upstream dams hold back the river in the spring so farmers like Mr. Waters can use heavy machinery to plant corn in the flood plain.
In theory, it can move so fast that ripples on the surface are no longer able to escape back upstream.
